98 SAN DIEGO SOCIETY OF NATURAL HISTORY 
RUEDEMANN (Rudolf)—Continued 
American Journal of Geology and Natural Science, pp. 558-560, plate 14, was the 
original publication in which Dr. Green figures dsaphus micrurus, fig. 3, and Ceraurus 
pleurexanthemus, fig. 10. 
Account of some new or little known species of fossils, mostly 
from Paleozoic rocks of New York. 
Bull. New York State Mus., No. 189, 1916. 
The author describes the following Crustacea: 
Agnostus Cushingi noy. 
It differs from A. Neavtonensis Weller and its congeners in the broad, anteriorly 
well-rounded convex cranidium and obscure glabella. 
Amphilichas conifrons nov. 
This species differs from 4. Trentonensis Hall, in the entirely different outline of 
the middle lobe of the glabella, which in the former is widest behind and in the new 
species broadens forward. 
Ceratiocaris (Liminocaris) salina nov. 
Spathiocaris Emersont Clarke. 
These specimens differ markedly from the strange valves figured with S. Emersont 
on plate 34, fig. 13, Pal. N. Y., vol. 7, which latter possesses a) much broadened flat 
posterior fold and a very shallow anterior notch. ‘he author makes a new species 
of this form, referring it to Pholadocaris Lutheri. 
Spathiocaris lata novy., S. chargrinensis nov. 8. Cushingi nov. S. Williamsi nov. 
This is of larger size than the congenors and is readily distinguished by its broad form 
and coarse lines. 
On p. 98 the author gives a discussion on the genera Spathiocaris and the Discino- 
carina and certain organic bodies called Cardiocaris, Pholadocars, ete., by Woodward 
and Clarke, considered as Crustaceans by other authors (Roemer, DeVerneuil, Kayser 
and Dames) as aptychi of Goniatites. 
Lepidocoleidae. Anatifopsis Wardelli nov. 
Pseudoniscus. 
The eyes of this genus have for some time been an object of speculation. Niesz- 
kowski, pl. 2, fig. 15, who first described a Pseudoniscus, figured a small incision along 
the edge of the fixed cheek as place for the eye; Eichwald Lethaea Ross, p. 1445, 
speaks there of large lunular eyes, and Woodward, Mong. of the Merostoma, p. 177, 
fig. 65, restored the cephalon completely with eyes. 
The author describes. Pseudoniscus Roosevelti Clarke and P. Clarkei noy., a Bertie 
Waterline species. ! 
Echinognathus Clevelandi Walcott. Eusarcus trigonus nov. 
Article Il. Notes of the habitat of the Eurypterids. 
Article 1V.. A new Ceraurus from the Chazy, by Perey E. Raymond. Ceraurus 
Reudemanni nov. 
Article V. The presence of a median eye in Trilobites. 
Gives figures in text of Isotelus gigas and Basilicus tryannus. It is claimed in this 
paper that most, if not all, ‘Trilobites possessed a median or parietal eye on the glabella. 
A great number of species, belonging to more than 30 genera, possess a distinct tu- 
bercle on the glabella. ‘This tubercle occurs alone in many genera otherwise smooth, 
as in Asaphidae and is hence of functional importance. The author gives a list of the 
species with median eye tubercles. 
Article VI. The cephalic suture lines of Cryptolithus. 
The author gives figures in the text of Dionide formosa Barr. D. atra Salter and 
Cryptolithus tesselatus Green. ‘The author concludes that these genera are not Hypo- 
